Diffuser for a LED light bulb



FIG. 1 is a side perspective view of a diffuser for a LED light bulb showing the new design.

FIG. 2 is a side view thereof.

FIG. 3 is a top view thereof.

FIG. 4 is a bottom view thereof; and,

FIG. 5 is a bottom perspective view thereof.

The surface lines, broken lines, and graphics are not part of the claimed design. 

CLAIM The ornamental design for a diffuser for a LED light bulb, as shown and described. 